Work vehicle operator station with swivel arm swing avoidance system

ABSTRACT

An operator station includes a base frame; a chair is configured to swivel in first and second clock directions; and first and second chair arms. The first chair arm includes a first chair arm body disposed proximate and repositionable with respect to a first lateral side of the chair; and a first chair arm adjustment mechanism coupled to the base frame and the first chair arm body and configured to permit the first chair arm to rotate in a first lateral plane relative to the chair in the first clock direction when the chair rotates in the second clock direction relative to the base frame and to rotate in the first lateral plane relative to the chair frame in the second clock direction when the chair rotates in the first clock direction relative to the base frame.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a nonprovisional application of and claims priorityto U.S. Provisional Application No. 62/979,922, filed Feb. 21, 2020.U.S. Provisional Application No. 62/979,922 is hereby incorporated byreference.

STATEMENT OF FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not applicable.

FIELD OF THE DISCLOSURE

This disclosure relates to a work vehicle, and more particularly, to anoperator station for a work vehicle.

BACKGROUND OF THE DISCLOSURE

A work vehicle, such as a tractor, performs numerous work functions,including the maneuvering of the vehicle and manipulation of associatedwork implements. Such functions may require a large number of controlsand interfaces arranged within an operator station of the work vehiclecab. An operator chair of the operator station must be positioned withinthe work vehicle cab to comfortably support the operator as well asprovide ready access to the controls and interfaces. Theseconsiderations may result in a crowded operator cab with potentialspatial conflicts or interferences between the operator chair andcontrols or interfaces.

SUMMARY OF THE DISCLOSURE

In one example, an operator station is provided for a cab of a workvehicle. The operator station includes a base frame configured to besecured to a floor of the cab; a chair including a chair frame mountedon the base frame such that the chair is configured to swivel in firstand second clock directions; a first chair arm; and a second chair arm.The first chair arm includes a first chair arm body disposed proximateand repositionable with respect to a first lateral side of the chair;and a first chair arm adjustment mechanism coupled to the base frame andthe first chair arm body and configured to permit the first chair arm torotate in a first lateral plane relative to the chair in the first clockdirection when the chair rotates in the second clock direction relativeto the base frame and to rotate in the first lateral plane relative tothe chair frame in the second clock direction when the chair rotates inthe first clock direction relative to the base frame. The second chairarm includes a second chair arm body disposed proximate andrepositionable with respect to a second lateral side of the chair; and asecond chair arm adjustment mechanism coupled to the base frame and thesecond chair arm and configured to permit the second chair arm body torotate in a second lateral plane relative to the chair frame in thesecond clock direction when the chair rotates in the first clockdirection relative to the base frame and to rotate in the second lateralplane relative to the chair frame in the first clock direction when thechair rotates in the second clock direction relative to the base frame.The rotation of the first chair arm body with respect to the chair frameand the rotation of the second chair arm body with respect to the chairframe occurs during at least a subset of angles of relative rotation ofthe chair with respect to the base frame.

In a further example, an operator system is provided for a cab of a workvehicle. The operator system includes at least one work vehicle console;and an operator station for the cab of the work vehicle. The operatorstation includes a base frame configured to be secured to a floor of thecab; a chair including a chair frame mounted on the base frame such thatthe chair is configured to swivel in first and second clock directions;a first chair arm; and a second chair arm. The first chair arm includesa first chair arm body disposed proximate and repositionable withrespect to a first lateral side of the chair; and a first chair armadjustment mechanism coupled to the base frame and the first chair armbody and configured to permit the first chair arm to rotate in a firstlateral plane relative to the chair in the first clock direction whenthe chair rotates in the second clock direction relative to the baseframe and to rotate in the first lateral plane relative to the chairframe in the second clock direction when the chair rotates in the firstclock direction relative to the base frame. The second chair armincludes a second chair arm body disposed proximate and repositionablewith respect to a second lateral side of the chair; and a second chairarm adjustment mechanism coupled to the base frame and the second chairarm and configured to permit the second chair arm body to rotate in asecond lateral plane relative to the chair frame in the second clockdirection when the chair rotates in the first clock direction relativeto the base frame and to rotate in the second lateral plane relative tothe chair frame in the first clock direction when the chair rotates inthe second clock direction relative to the base frame. The rotation ofthe first chair arm body with respect to the chair frame and therotation of the second chair arm body with respect to the chair frameoccurs during at least a subset of angles of relative rotation of thechair with respect to the base frame to avoid contact with the at leastone work vehicle console.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front perspective view of an example work vehicle in theform of a tractor in which the disclosed operator station may be used;

FIG. 2 is a top front perspective view of a cab interior of the workvehicle of FIG. 1;

FIG. 3 is a front first side view of an operator station from the cabinterior of the work vehicle of FIG. 2;

FIG. 4 is a partial bottom first side view of the operator station ofFIG. 3;

FIG. 5 is a partial top view of the operator station of FIG. 3;

FIG. 6A is a first side view of the operator station of FIG. 3 with acontrol arm in a low position;

FIG. 6B is another first side view of the operator station of FIG. 3with the control arm in a high position;

FIG. 7 is a first side view of a control arm adjustment mechanism of theoperation station of FIG. 3;

FIG. 8 is a second side perspective view of the control arm adjustmentmechanism of the operation station of FIG. 3;

FIG. 9 is an exploded view of the control arm adjustment mechanism ofthe operation station of FIG. 3;

FIG. 11 is a partial detail view of a section of FIG. 4;

FIG. 12 is a second side view of the operator station of FIG. 3;

FIG. 13A is a schematic top view of the operation station of FIG. 3 in aneutral state;

FIG. 13B is a partial schematic first side view of the operation stationof FIG. 3 in the neutral state;

FIG. 14A is a schematic top view of the operation station of FIG. 3 in aclockwise state;

FIG. 14B is a partial schematic first side view of the operation stationof FIG. 3 in the clockwise state;

FIG. 15A is a schematic top view of the operation station of FIG. 3 in acounterclockwise state;

FIG. 15B is a partial schematic first side view of the operation stationof FIG. 3 in the counterclockwise state;

FIG. 16 is a further second side view of an operator station of FIG. 3;

FIG. 17 is a partial cross-sectional view through line 17-17 of FIG. 16;

FIG. 18A is a partial cross-sectional view through line 18A-18A of FIG.17 with an armrest vertical lift adjustment apparatus in a clampedstate;

FIG. 18B is a partial cross-sectional view corresponding to FIG. 18Awith the armrest vertical lift adjustment apparatus in an unclampedstate;

FIG. 19A is a partial cross-sectional view through line 18A-18A with thearmrest vertical lift adjustment apparatus in the clamped state; and

FIG. 19B is a partial cross-sectional view corresponding to FIG. 19A ofthe armrest vertical lift adjustment apparatus in the unclamped state.

Like reference symbols in the various drawings indicate like elements.

DETAILED DESCRIPTION

The following describes one or more example embodiments of the disclosedoperator station for a work vehicle, as shown in the accompanyingfigures of the drawings described briefly above. Various modificationsto the example embodiments may be contemplated by one of skill in theart.

As used herein, unless otherwise limited or modified, lists withelements that are separated by conjunctive terms (e.g., “and”) and thatare also preceded by the phrase “one or more of” or “at least one of”indicate configurations or arrangements that potentially includeindividual elements of the list, or any combination thereof. Forexample, “at least one of A, B, and C” or “one or more of A, B, and C”indicates the possibilities of only A, only B, only C, or anycombination of two or more of A, B, and C (e.g., A and B; B and C; A andC; or A, B, and C).

As used herein, the term “axial” refers to a direction that is generallyparallel to an axis of rotation, axis of symmetry, or centerline of acomponent or components. For example, in a cylinder or disc with acenterline and opposite, generally circular ends or faces, the “axial”direction may refer to the direction that generally extends in parallelto the centerline between the opposite ends or faces. In certaininstances, the term “axial” may be utilized with respect to componentsthat are not cylindrical (or otherwise radially symmetric). Furthermore,the term “radially” as used herein may refer to a direction or arelationship of components with respect to a line extending outward froma shared centerline, axis, or similar reference, for example in a planeof a cylinder or disc that is perpendicular to the centerline or axis.In certain instances, components may be viewed as “radially” alignedeven though one or both of the components may not be cylindrical (orotherwise radially symmetric). Furthermore, the terms “axial” and“radial” (and any derivatives) may encompass directional relationshipsthat are other than precisely aligned with (e.g., oblique to) the trueaxial and radial dimensions, provided the relationship is predominatelyin the respective nominal axial or radial direction.

As used below, unless otherwise noted, the term “longitudinal” mayencompass an orientation parallel to an axis extending between the frontof the work vehicle and the rear of the work vehicle (e.g., forward andaft or forward and reverse). Similarly, the term “lateral” may encompassan orientation parallel to an axis extending from one side of the workvehicle to the other, perpendicular to the longitudinal orientation. Theterm “horizontal” plane may be considered to include a plane thatincludes a longitudinal axis and a lateral axis, which may also bereferred to as a “lateral” plane in the discussion below. The term“vertical” may encompass an orientation parallel to an axis extendingbetween the top and bottom of the work vehicle, perpendicular to thelongitudinal and lateral orientations. As used below, adjustment withina vertical plane or in a vertical orientation refers to a heightadjustment in which a component is raised or lowered perpendicularlyrelative to a longitudinal-lateral (or horizontal) (or merely,“lateral”) plane. In other words, the terms “horizontal” and “vertical”are not necessarily absolute orientations (e.g., relative to “seallevel”). The terms “inboard” (or “inward”) and “outboard” (or “outward”)may refer to relative lateral directions with respect to a centrallongitudinal axis of the work vehicle. For example, “inboard” refers toa relative direction towards the center of the work vehicle, and“outboard” refers to a relative direction away from the center of thework vehicle.

The terms “front” (or “forward”) and “rear” are relative to one anotherand refer to the primary propulsion direction of the work vehicle, suchthat a “front” direction is oriented towards a forward propulsiondirection and the “rear” direction is oriented toward a reversepropulsion direction, opposite to the forward direction. Similarly, theterms “top” and “bottom,” and “up” and “down,” are relative to oneanother with respect to vertical orientations. Finally, the terms“clockwise” and “counterclockwise” (or “clock directions”) arereferenced below as pivot directions with respect to a top view relativeto a front direction. However, it should be noted that the references torelative terms discussed below are merely examples and that thedirection or orientations may be reversed within the context of thepresent disclosure.

The following describes an example operator system formed by an operatorstation surrounded by one or more consoles. The operator stationincludes an operator chair with arms that are pivotable along a lateralaxis, horizontally pivotable within a lateral plane, and upwardly anddownwardly repositionable within a work vehicle cab to enhance operatorcomfort and to avoid interference between the operator station and theconsoles. For example, each of the chair arms may be laterally pivotablyaway from the steering wheel as the chair swivels the pivoting armtowards the steering wheel. Further, one or both arms may be pivotedupwards when swiveling the chair towards a console to avoid contact,and/or one or both arms may be repositionable upwards and downwards toenhance operator comfort. Such cooperating and/or independent adjustmentmechanisms may include a number of chair struts and cams mounted to thechair frame and a number of cam tracks mounted to the base frame, aswill be described below. As such, the disclosed embodiments provide awork vehicle operation station with a swivel arm raise avoidance system,a swivel arm swing avoidance system, and an arm height adjustmentmechanism, which may be used individually or in combination. It will beunderstood that the implementation of the operator system within atractor as the work vehicle is presented as an example only. Other workvehicles, such as those used in the construction industry or otheragricultural vehicles, may benefit from the disclosed operator stationas well.

FIG. 1 is a front perspective view of an example work vehicle 100 in theform of a tractor in which the disclosed operator system, operatorstation, and operator chair may be used. Generally, the work vehicle 100may be considered to have a cab 102 supported by a frame or chassis 104.The work vehicle 100 may additionally include a powertrain 106 with oneor more components to generate, store, and transfer energy to propel thework vehicle 100 and perform one or more work tasks. Components of thepowertrain 106 may include, as examples, an engine, motor, battery,transmission, axles, wheels, controllers, actuators, and the like.Although not shown, the work vehicle 100 may further include one or moreimplements to perform the work tasks. The work vehicle 100 may have anysuitable components necessary or desired for operation. As discussed ingreater detail below, an operator system 108 may be housed within thecab 102 to control various aspects the work vehicle 100, includingmaneuvering the work vehicle 100 and manipulating the implements of thework vehicle 100.

FIG. 2 is a top front perspective view of the interior of the cab 102 ofthe work vehicle 100 of FIG. 1 that houses the operator system 108. Inone example, the operator system 108 formed by an operator station 110mounted on a floor of the cab 102, a first and second side consoles 112,114 on either side of the operator station 110, and a forward console118 in front of the operator station 110. Generally, the first andsecond side consoles 112, 114 support one or more operator interfaces,including a monitor 116; and the forward console 118 supports one ormore operator interfaces, including a steering wheel 120.

The operator station 110 may be considered to include an operator chair122 to support an operator, a first arm 124 on a first (or right) sideof the operator chair 122, and a second arm 126 on the second (or left)side of the operator chair 122. In one example, the first arm 124 may beconsidered a control arm 124 since one or more operator interfaces(e.g., “controls”) may be integrated into a top surface, and the secondarm 126 may be considered an armrest 126 without controls. However, itshould be noted that the arms 124, 126 may have various configurations.For example, the positions of the control arm 124 and the armrest 126may be swapped; the first arm 124 may be implemented without controls(e.g., both arms 124, 126 being “armrests”); and/or the second arm 126may be implemented with a number of controls (e.g., both arms 124, 126being “control arms”).

Typically, the operator chair 122 may be pivoted or swiveled inclockwise and counterclockwise directions for comfort and/or to improvesightlines or fields-of-view within the cab 102. As described in greaterdetail below, operator station 110 may include a number of adjustmentarrangements to reposition or move the control arm 124 and/or armrest126 during these movements in order to avoid any conflict orinterference between the control arm 124 and/or armrest 126 and theconsoles 112, 114, 118.

The operator station 110 is depicted in greater detail in the isometricview of FIG. 3. As introduced above, the operator station 110 generallyincludes the operator chair 122 formed by a backrest 130 and seat 136,each with a respective cushion 132, 138 mounted on an underlying chairframe 134. The chair frame 134 of the chair 122 is mounted on a baseframe 142 secured or fixed to the cab floor. As described in greaterdetail below, the operator chair 122 is configured to swivel in ahorizontal or lateral plane relative to the base frame 142 in first andsecond clock directions (e.g., clockwise and counterclockwisedirections). Additional details about the operator station 110 aredepicted in greater detail in the views of FIGS. 4 and 5, in which thechair cushion 138 has been removed for clarity. For example, the topview of FIG. 5 depicts the seat frame 140 coupled to the base frame 142on a frame bearing 144 that enables clockwise and counterclockwisemovements of the operator chair 122 relative to the base frame 142 abouta center swivel axis.

Referring to FIGS. 3-5, in one example, the control arm 124 may beconsidered to include a control arm body 150 at least partially mountedto the operator chair 122 with a control arm adjustment mechanism 152.Generally, the control arm body 150 may provide a support surface forthe right arm of the operator and further support the controls 154introduced above for access by the operator. The control arm adjustmentmechanism 152 operates to reposition the control arm body 150 in anumber of ways, including pivoting the forward end of the control armbody 150 in a “vertical” direction (e.g., perpendicular to a lateralplane) relative to the other portions of the operator chair 122;pivoting the forward end of the control arm body 150 in a “horizontal”or lateral direction relative to the other portions of the operatorchair 122; and/or lifting and/or lowering the entire control arm body150 relative to the other portions of the operator chair 122.

The armrest 126 may be considered to include an armrest body 170 atleast partially mounted to the operator chair 122 with an armrestadjustment mechanism 172. The armrest adjustment mechanism 172 operatesto reposition the armrest body 170 in a number of ways, includingpivoting the forward end of the armrest body 170 in a horizontal orlateral direction relative to the other portions of the operator chair122; and lifting and/or lowering the entire armrest body 170 relative tothe other portions of the operator chair 122.

The base frame 142 includes a number of elements that cooperate with thecontrol arm adjustment mechanism 152 and the armrest adjustmentmechanism 172 to reposition the control arm 124 and the armrest 126. Inparticular, a control arm vertical track 160 is part of the base frame142 and cooperates with the control arm adjustment mechanism 152 topivot the forward end of the control arm body 150 in a verticaldirection relative to the other portions of the operator chair 122. Acontrol arm horizontal track 162 is part of the base frame 142 andcooperates with the control arm adjustment mechanism 152 to pivot theforward end of the control arm body 150 in a horizontal directionrelative to the other portions of the operator chair 122. Further, anarmrest horizontal track 174 is part of the base frame 142 andcooperates with the control arm adjustment mechanism 152 to pivot theforward end of the armrest body 170 in a horizontal direction relativeto the other portions of the operator chair 122. Additional informationwill be provided below regarding adjustments of the control arm 124 andthe armrest 126, including the cooperating or co-movements of thecontrol arm 124 and armrest 126.

Reference is now made to FIGS. 6A and 6B, which are first side views ofthe operator station 110 from the side of the control arm 124. Asintroduced above, the control arm adjustment mechanism 152 enablesadjustment of the control arm 124 (particularly the control arm body150) in the form of a non-pivoting lifting and lowering movements withinin a vertical plane. For example, the view of FIG. 6A depicts thecontrol arm 124 in a relatively low position. In contrast, the view ofFIG. 6B depicts the control arm 124 in a relatively high position inwhich the control arm body 150 has been moved vertically upwardsrelative to the base frame 142 and the other portions of the operatorchair 122. As such, the operator may select a more comfortable orefficient control arm position with which to operate the work vehicle100. Additional details regarding the control arm adjustment mechanism152 will be now be provided, particularly with respect to the verticaland horizontal pivoting functions.

FIGS. 7-10 are more detailed views of the control arm adjustmentmechanism 152. In particular, FIG. 7 is a first side view of the controlarm adjustment mechanism 152 mounted to the underside of the control armbody 150; FIG. 8 is a rear second side view of the control armadjustment mechanism 152 removed from the operator chair 122; FIG. 9 isan exploded view of the control arm adjustment mechanism 152 from asimilar perspective as FIG. 8; and FIG. 10 is a rear second side view ofthe control arm adjustment mechanism 152 mounted to the underside of thecontrol arm 124 and also interacting with aspects of the base frame 142.

As most clearly depicted in the exploded view of FIG. 9, the control armadjustment mechanism 152 may be considered to include, generally fromtop to bottom, an adjustment bracket 180; a support piston 182; afour-bar linkage 184 with top and bottom parts 186, 188; a control armvertical pivot adjustment member 190; a control arm horizontal pivotadjustment member 192; and a spring 194.

In this example, the adjustment bracket 180 is generally formed bybracket base 200 with a horizontal surface configured be to attached tothe underside of the control arm body 150. The adjustment bracket 180further includes a flange portion 202 extending downward, underneath thebracket base 200 with a number of mounting elements 204, 206, 208. Thefirst and second adjustment bracket mounting elements 204, 206 arecoupled to the four-bar linkage 184, discussed below. Further, the thirdadjustment bracket mounting element 208 is configured to receive a first(or piston) end of the support piston 182 on the underside of thebracket base 200 proximate to the flange portion 202, while a second (orcylinder) end of the support piston 182 may be mounted to the controlarm vertical pivot adjustment member 190, discussed below.

As noted above, the four-bar linkage 184 includes top and bottom parts186, 188, each with forward and rearward mounting elements 214, 216,217, 220. The forward mounting elements 214, 218 of the top and bottomparts 186, 188 are secured to respective mounting elements 204, 206 ofthe flange portions 202 of the adjustment bracket 180. The rearwardmounting elements 216, 220 may be secured to the control arm verticalpivot adjustment member 190, discussed below.

The control arm vertical pivot adjustment member 190 is generally formedby a base 224 and a strut 226 extending downward and forward from thebase 224. The control arm vertical pivot adjustment member base 224includes a number of mounting elements 228, 230, 232, 234, 236,including a first and second mounting elements 228, 230 that may berespectively coupled to the rearward mounting elements 216, 220 of thetop and bottom parts 186, 188 of the four-bar linkage 184; a thirdmounting element 232 that couples the control arm vertical pivotadjustment member 190 to the control arm horizontal pivot adjustmentmember 192 with a bearing axle 238; a fourth mounting element 234 thatreceives a forward end of the spring 194; and a fifth mounting element236 that is coupled to the second end of the support piston 182 with afastener. The control arm vertical pivot adjustment member 190 furtherincludes a control arm vertical pivot adjustment cam 240 mounted on adistal end of the strut 226. The control arm vertical pivot adjustmentcam 240 includes first and second spring loaded cam elements 242, 244that, as described below, engage the control arm vertical track 160.Briefly, as depicted in FIG. 11, the first and second spring loaded camelements 242, 244 respectively engage upper and lower rails of thecontrol arm vertical track 160 as the cam 240 travels along the track160, as discussed in greater detail below. In some embodiments, thecontrol arm vertical track 160 may be horizontally or laterally curvedto accommodate movement of the vertical pivot adjustment cam 240 as thechair 122 swivels in the clockwise and counterclockwise directions.

The control arm horizontal pivot adjustment member 192 is generallyformed by a base 246 and a strut 248 extending inwardly from the side ofthe base 246. The base 246 of the control arm horizontal pivotadjustment member 192 also includes a number of mounting elements 250,252, 254, including a first mounting element 250 in the form of acylindrical shaft mounting element that receives a control arm mountingpost 260 having an upright post axis, a second mounting element 252 thatenables the control arm horizontal pivot adjustment member 192 to becoupled to the mounting element 232 of the control arm vertical pivotadjustment member 190 via the bearing axle 238; and a third mountingelement 254 that secures one of the spring 194. The control armhorizontal pivot adjustment member 192 further includes a control armhorizontal pivot adjustment cam 256 at the distal end of the strut 248that, as described below, engages the control arm horizontal track 162.In one example, the bearing axle 238 may provide a lateral pivot axis(e.g., axis 140 d, discussed below) that enables the control armvertical pivot adjustment member 192 to be pivoted upwards and downwardsrelative to the control arm horizontal pivot adjustment member 192.

As best shown by FIG. 10, the cylindrical shaft mounting element 250 ofthe control arm horizontal pivot adjustment member 192 couples thecontrol arm adjustment mechanism 152 to the seat frame 140 via a controlarm mounting post 260. As a result of this arrangement, the control arm124 may horizontally pivot about the control arm mounting post 260 in alateral plane relative to the seat frame 140, as described in greaterdetail below.

Referring briefly again to FIGS. 6A and 6B, in addition to FIGS. 7-10,the control arm adjustment mechanism 192 additionally enables thevertical lifting and lowering movement of the control arm body 150. Asshown by a comparison of FIGS. 6A and 6B, the top and bottom parts 186,188 of the four-bar linkages 184 may pivot at the rearward mountingelements 216, 220 relatives to the control arm vertical pivot adjustmentmember 190, thereby lifting the forward end of the four-bar linkage 184.Due to the arrangement of the four-bar linkage 184, the forward end ofthe four-bar linkage 184 raises adjustment bracket 180 and attachedcontrol arm body 150. The support piston 182 and/or spring 194 may beprovided to support, stabilize, and/or facilitate either the upwardmovement of the control arm body 150 depicted from FIG. 6A to FIG. 6B orthe downward movement of the control arm body 150 depicted from FIG. 6Bto FIG. 6A.

The view of FIG. 12 is an isometric view of the armrest 126,particularly the relationship between the armrest 126, the seat frame140, and the base frame 142. As shown, the armrest body 170 is generallymounted to an armrest mounting post 270 (with an upright post axisgenerally substantially perpendicular to the chair seat 136), which inturn is mounted to the seat frame 140 with an armrest frame bracket 272.In particular, the armrest body 170 is positioned on a top end of thearmrest mounting post 270 via a body mounting element 274. As discussedin greater detail below, the armrest body 170 may be vertically liftedand lowered along the armrest mounting post 270, and horizontallypivoted in a lateral plane about the axis of the armrest mounting post270.

As also shown in FIG. 12, an armrest horizontal pivot adjustmentapparatus 276 is mounted on a lower end of the mounting post 270. Thearmrest horizontal pivot adjustment apparatus 276 is formed by acoupling strut 278 and an armrest horizontal pivot adjustment cam 280. Afirst end of the armrest horizontal pivot adjustment apparatus couplingstrut 278 is secured to lower end of the armrest mounting post 270.Moreover, the armrest horizontal pivot adjustment cam 280 is mounted tothe underside of a second end of the armrest horizontal pivot adjustmentapparatus coupling strut 278. As shown, the armrest horizontal pivotadjustment cam 280 is engaged with the armrest horizontal track 174 ofthe base frame 142, as discussed in greater detail below.

The view of FIGS. 13A, 13B, 14A, 14B, 15A, and 15B are schematic topviews (FIGS. 13A, 14A, 15A) and schematic side views (FIGS. 13B, 14B,15B) of the operator station 110 in different horizontal swivelpositions or states of the chair 122. In particular, the chair 122 ofthe operator station 110 may swivel from a neutral state (as shown inFIGS. 13A and 13B) into a clockwise direction for a clockwise state (asshown in FIGS. 14A and 14B) and/or into a counterclockwise direction fora counterclockwise state (as shown in FIGS. 15A and 15B). In FIGS. 13A,13B, 14A, 14B, 15A, and 15B, various axes 140 a, 140 b, 140 c, and 140 dare labeled and discussed below. Generally, as an introduction, axis 140a is a swivel axis about which the chair 122 swivels relative to thebase frame 142; axis 140 b is a control arm horizontal pivot axis(coincident with the axis of the mounting post 260) about which thecontrol arm body 150 pivots relative to chair frame 134 during at leasta portion of the swiveling movement of the chair 122; axis 140 c is anarmrest horizontal pivot axis (coincident with the axis of the mountingpost 270) about which the armrest body 170 pivots relative to chairframe 134 during at least a portion of the swiveling movement of thechair 122; and axis 140 d (coincident with the axis of the bearing axle238) is a control arm vertical pivot axis about which the control armbody 150 pivots during at least a portion of the swiveling movement ofthe chair 122. The various positions of the control arm 124 and armrest126 during such swiveling movement is described below in greater detailwith initial reference to FIGS. 13A and 13B referencing the neutralstate.

As shown in FIG. 13B, the chair 122 is positioned such that the controlarm vertical pivot adjustment cam 240 mounted to the control armvertical adjustment apparatus coupling strut 226 on the seat frame 140is located within a relatively center portion of the control armvertical track 160. In this chair position and associated control armvertical track portion, the control arm body 150 is at a first or levelvertical pivot control arm-chair position relative to the chair 122,which generally results in the control arm body 150 being horizontalrelative to the operator chair 122.

As shown in FIG. 13A, the operator chair 122 is positioned such that thecontrol arm horizontal pivot adjustment cam 256 mounted to the controlarm horizontal pivot adjustment member strut 248 on the seat frame 140is located within a relatively center portion of the control armhorizontal track 162. In this chair position and associated control armhorizontal track portion, the control arm body 150 is at a firsthorizontal pivot control arm-chair position relative to the operatorchair 122 and a first horizontal pivot control arm-base positionrelative to the base frame 142. As shown, the first horizontal pivotcontrol arm-chair position of the control arm body 150 in the neutralstate is generally parallel to the operator chair 122, and the firsthorizontal pivot control arm-base position of the control arm body 150in the neutral state is generally parallel to the base frame 142.

As shown in FIG. 13A, the operator chair 122 is positioned such that thearmrest horizontal pivot adjustment cam 280 mounted to the armresthorizontal pivot adjustment apparatus coupling strut 278 on the seatframe 140 is located within a relatively center portion of the armresthorizontal track 174. In this chair position and associated armresthorizontal track portion, the armrest body 170 is at a first horizontalpivot armrest-chair position relative to the operator chair 122 and afirst horizontal pivot armrest-base position relative to the base frame142. As shown, the first horizontal pivot armrest-chair position of thearmrest body 170 is generally parallel to the operator chair 122 in theneutral state, and the first horizontal pivot armrest-base position ofthe armrest body 170 is generally parallel to the base frame 142 in theneutral state.

As noted above, the views of FIGS. 14A and 14B depict the interaction ofthe control arm 124 and armrest 126 relative to the chair 122 and/or thebase frame 142 as the operator chair 122 horizontally swivels through asubset of angles that are in a clockwise direction relative to theneutral state (as clockwise states).

As shown in FIG. 14B, the operator chair 122 is positioned such that thecontrol arm vertical pivot adjustment cam 240 mounted to the control armvertical adjustment apparatus coupling strut 226 on the seat frame 140is located within a relatively rearward portion of the control armvertical track 160. In this chair position and associated control armvertical track portion, the control arm body 150 is at a second verticalpivot control arm-chair position relative to the operator chair 122 inwhich the control arm body 150 is pivoted upwards. The upward pivotingmovement of the control arm body 150 is a result of the upwardlyextending portion of the control arm vertical track 160 that the controlarm vertical pivot adjustment cam 240 follows as the chair 122 isswiveled within the clockwise states. The control arm body 150 pivotsupright about a lateral axis substantially perpendicular to a swivelaxis of the operator chair 122 as the operator chair 122 rotates aboutthe swivel axis with respect to the base frame 142. As a result of thispivoting movement, the control arm body 150 may avoid interference ofconflict with the first console 112 (FIG. 2).

As shown in FIG. 14A, the chair 122 is positioned such that the controlarm horizontal pivot adjustment cam 256 mounted to the control armhorizontal pivot adjustment member strut 248 on the seat frame 140 islocated within a relatively rearward portion of the control armhorizontal track 162. The shape of the control arm horizontal track 162is such that the relatively rearward portion is radially consistent orconstant relative to the centers of the base frame 142 and seat frame140 (which in this example are coincident). As a result, duringclockwise movement, the control arm horizontal pivot adjustment cam 256follows the relatively rearward portion of the control arm horizontaltrack 162 such that the ends of the control arm horizontal pivotadjustment member strut 248 are held constant relative to one another tomaintain the relative position of the control arm body 150 relative tothe seat 122 as the entire operator chair 122 is pivoting relative tothe base frame 142. In this chair position and associated control armhorizontal track location, the control arm body 150 is at a secondhorizontal pivot control arm-chair position relative to the operatorchair 122 and a second horizontal pivot control arm-base positionrelative to the base frame 142. As shown, the second horizontal pivotcontrol arm-chair position is similar or identical to the secondhorizontal pivot control arm-chair position. In other words, the controlarm body 150 swivels with the chair 122, without pivoting relative tothe chair 122. The second horizontal pivot control arm-base positionrelative to the base frame 142 is a result of the control arm body 150pivoting with the overall operator chair 122 relative to the base frame142. As the operator chair 122 swivels in the clockwise direction fromthe neutral state, the control arm body 150 continues to pivot with theoperator chair 122. This may enable the control arm body 150 to maintainthe position relative to the operator chair 122, typically selected bythe operator for comfort, while moving the operator chair 122 in theclockwise direction.

As shown in FIG. 14A, the operator chair 122 is positioned such that thearmrest horizontal pivot adjustment cam 280 mounted to the armresthorizontal pivot adjustment apparatus coupling strut 278 on the seatframe 140 is located within a relatively forward portion of the armresthorizontal track 174. The shape of the armrest horizontal track 174 issuch that the relatively forward portion radially deviates away from thecenters of the base frame 142 and seat frame 140. In other words, theforward portion of the armrest horizontal track 174 extends away fromthe base frame 142 and seat frame 140. As a result, although the armrestmounting post 270 is secured to the seat frame 140 and moves with theseat frame 140, the armrest horizontal pivot adjustment cam 280 followsthe relatively forward portion of the armrest horizontal track 174 suchthat the ends of the armrest horizontal pivot adjustment apparatuscoupling strut 278 are rotated relative to one another to pivot thearmrest body 170 relative to the seat 136 as the entire operator chair122 is swiveling relative to the base frame 142. In this chair positionand associated armrest horizontal track location, the armrest body 170is at a second horizontal pivot armrest-chair position relative to theseat 136 and a second horizontal pivot armrest-base position relative tothe base frame 142. As shown, the second horizontal pivot armrest-chairposition is the result of the armrest body 170 pivoting away from theseat 136. The second horizontal pivot armrest-base position relative tothe base frame 142 is a result of the armrest body 170 pivoting closerto the base frame 142 as a result of the overall clockwise swivelingmovement of the chair 122, but is also further away from the base frame142 than would otherwise be the case relative to the neutral state as aresult of the horizontal pivoting of the armrest body 170 relative tothe seat 136. As the operator chair 122 moves in the clockwise directionfrom the neutral position, the armrest body 170 continues to pivot awayfrom front portions of the seat 136. In effect, the armrest body 170 maybe considered to pivot in a counterclockwise direction about axis 140 cwhen the chair 122 swivels in the clockwise direction about the swivelaxis 140 a (and vice versa) within the clockwise states. The relativerotation of the armrest body 170 with respect to the chair 122 occursduring at least a subset of angles of relative rotation of the chairframe 134 with respect to the base frame 142. This may enable thearmrest body 170 to avoid interference or contact with the steeringwheel 120 (FIG. 2) when moving the operator chair 122 in the clockwisedirection. Any suitable maximum angle between the armrest body 170 andthe seat frame 140 may be provided when swiveling in the clockwisedirection, such as approximately 30°.

As noted above, the views of FIGS. 15A and 15B depict the interaction ofthe control arm 124 and armrest 126 relative to the seat 136 and/or thebase frame 142 as the operator chair 122 horizontally swivels in througha subset of angles that are in a counterclockwise direction relative tothe neutral state (as counterclockwise states).

As shown in FIG. 15B, the operator chair 122 is positioned such that thecontrol arm vertical pivot adjustment cam 240 mounted to the control armvertical adjustment apparatus coupling strut 226 on the seat frame 140is located within a relatively forward portion of the control armvertical track 160. In this chair position and associated control armvertical track portion, the control arm body 150 is at a third verticalpivot control arm-chair position relative to the seat 136, whichgenerally horizontal relative to the seat 136. The third vertical pivotcontrol arm-chair position is the same as the first vertical pivotcontrol arm-chair position depicted in FIG. 13A, which is a result ofthe track 160 having center and forward portions being level with oneanother.

As shown in FIG. 15A, the operator chair 122 is positioned such that thecontrol arm horizontal pivot adjustment cam 256 mounted to the controlarm horizontal pivot adjustment member strut 248 on the seat frame 140is located within a relatively forward portion of the control armhorizontal track 162. The shape of the control arm horizontal track 162is such that the relatively forward portion radially deviates away fromthe centers of the base frame 142 and seat frame 140. In other words,the forward portion of the control arm horizontal track 162 extends awayfrom the base frame 142 and seat frame 140. As a result, although thecontrol arm mounting post 260 is secured to the seat frame 140 and moveswith the seat 136, the control arm horizontal pivot adjustment cam 256follows the relatively forward portion of the control arm horizontaltrack 162 such that the ends of the control arm horizontal pivotadjustment member strut 248 are rotated relative to one another to pivotthe control arm body 150 relative to the seat 136 as the entire operatorchair 122 is swiveling relative to the base frame 142. In this chairposition and associated control arm horizontal track location, thecontrol arm body 150 is at a third horizontal pivot control arm-chairposition relative to the seat 136 and a third horizontal pivot controlarm-base position relative to the base frame 142. As shown, the thirdhorizontal pivot control arm-chair position is the result of the controlarm body 150 pivoting away from the seat 136. The third horizontal pivotcontrol arm-base position relative to the base frame 142 is a result ofthe control arm body 150 pivoting closer to the base frame 142 duringthe overall counterclockwise movement of the operator chair 122, but isalso further away from the base frame 142 than would otherwise be thecase relative to the neutral state as a result of the horizontalpivoting of the control arm body 150 relative to the seat 136. As theoperator chair 122 moves in the counterclockwise direction from theneutral state, the control arm body 150 continues to pivot away fromfront portions of the seat 136. In effect, the control arm body 150 maybe considered to pivot in a clockwise direction about axis 140 b whenthe chair 122 swivels in the counterclockwise direction about the swivelaxis 140 a (and vice versa) within the counterclockwise states. Therelative rotation of the control arm body 150 with respect to the chair122 occurs during at least a subset of angles of relative rotation ofthe chair frame 134 with respect to the base frame 142. This may enablethe control arm 124 to avoid interference or contact with the steeringwheel 120 (FIG. 2) when moving the operator chair 122 in thecounterclockwise direction. Any suitable maximum angle between thecontrol arm body 150 and the seat frame 140 may be provided whenswiveling in the counterclockwise direction, such as approximately 30°.

As shown in FIG. 15A, the operator chair 122 is positioned such that thearmrest horizontal pivot adjustment cam 280 mounted to the armresthorizontal pivot adjustment apparatus coupling strut 278 on the seatframe 140 is located within a relatively rearward portion of the armresthorizontal track 174. The shape of the armrest horizontal track 174 issuch that the relatively rearward portion is radially consistent orconstant relative to the centers of the base frame 142 and seat frame140. As a result, during counterclockwise movement, the armresthorizontal pivot adjustment cam 280 follows the relatively rearwardportion of the armrest horizontal track 174 such that the ends of thearmrest horizontal pivot adjustment apparatus coupling strut 278 areheld constant relative to one another to maintain the relative positionof the armrest body 170 relative to the seat 136 as the entire operatorchair 122 is pivoting relative to the base frame 142. In this chairposition and associated armrest horizontal track location, the armrestbody 170 is at a third horizontal armrest-chair position relative to thechair 122 and a third horizontal armrest-base position relative to thebase frame 142. As shown, the third horizontal armrest-chair position issimilar or identical to the first horizontal armrest-chair position. Thethird horizontal armrest-base position relative to the base frame 142 isa result of the armrest body 170 swiveling with the overall operatorchair 122 relative to the base frame 142. As the operator chair 122moves in the counterclockwise direction from the neutral state, thearmrest body 170 continues to swivel with the seat 136. This may enablethe armrest body 170 to maintain the position relative to the seat 136,typically selected by the operator for comfort, while moving theoperator chair 122 in the counterclockwise direction.

As depicted in FIGS. 13A, 13B, 14A, 14B, 15A, and 15B, operator station110 provides a cooperating system of seat 136, frames 134, 142, andchair arms 124, 126 in which the chair arms 124, 126 may simultaneouslypivot about multiple axes, at times, during the same or differentsubsets of swivel positions of the chair 122.

For example, during movement in a clockwise direction from the neutralstate through a clockwise state (e.g., FIGS. 13A and 13B to FIGS. 14Aand 14B), the armrest body 170 pivots about axis 140 c relative to thechair frame 134, e.g., outwardly from the chair frame 134, whileswiveling with the chair 122. In this same condition, the control armbody 150 is pivoted upwards in a vertical plane relative to the chairframe 134 and is stationary in a lateral plane relative to the chairframe 134 while swiveling with the chair 122. Moreover, during movementin a counterclockwise direction from and through the clockwise state tothe neutral state (e.g., FIGS. 14A and 14B back to FIGS. 13A and 13B),the armrest body 170 also pivots about axis 140 c relative to the chairframe 134, e.g., inwardly to the chair frame 134, while swiveling withthe chair 122. In this same condition, the control arm body 150 ispivoted downwards in the vertical plane relative to the chair frame 134and is stationary relative in the lateral plane to the chair frame 134while swiveling with the chair 122.

In contrast, during movement in a counterclockwise direction from theneutral state through a counterclockwise state (e.g., FIGS. 13A and 13Bto FIGS. 15A and 15B), the control arm body 150 pivots horizontally in alateral plane about axis 140 b relative to the chair frame 134, e.g.,outwardly from the chair frame 134, and remains stationary in a verticalplane relative to the chair frame 134, each while swiveling with thechair 122. Further in these conditions, the armrest body 170 isstationary relative to the chair frame 134 while swiveling with thechair. Moreover, during movement in a clockwise direction from andthrough the counterclockwise state to the neutral state (e.g., FIGS. 15Aand 15B back to FIGS. 13A and 13B), the control arm body 150 alsohorizontally pivots in a lateral plane about axis 140 b relative to thechair frame 134, e.g., inwardly to the chair frame 134, and isstationary in a vertical plane relative to the chair frame 134, eachwhile swiveling with the chair 122.

As such, the chair arms 124, 126 may simultaneously pivot about multipleaxes, at times, during the same or different subsets of swivel positionsof the chair 122. In particular, the control arm body 150 pivots in alateral plane only when the chair 122 is in a counterclockwise positionor angle, and while the direction that the control arm body 150 ispivoting is dependent on the swivel direction, the pivoting occurs ineach swivel direction in these positions. Moreover, the control arm body150 pivots in a vertical plane only when the chair 122 is in a clockwiseposition or angle, and while the direction that the control arm body 150is pivoting is dependent on the swivel direction, the pivoting occurs ineach swivel direction in these positions. The manner in which thecontrol arm body 150 pivots in the vertical plane in dependence on theswivel position may vary and be defined by the shape of the control armvertical track 160. For example, the control arm vertical track 160 mayhave an upwards slope at initial clockwise position swivel angles andlevel off at greater clockwise position swivel angles, thereby resultingin a pivoting movement when moving in the clockwise swivel directionsuch that the control arm body 150 initially begins to pivot up atrelatively small angles from the neutral position, then reaches amaximum pivot position at an angle at which the control arm body 150otherwise would contact the side console 112 to clear the side console112, and at further angles, the control arm body 150 may be maintainedat such a pivot position. Similarly, the armrest body 170 pivots onlywhen the chair 122 is in a clockwise position or angle, and while thedirection that the armrest body 170 is pivoting is dependent on theswivel direction, the pivoting occurs in each swivel direction in thesepositions. Collectively, this enables a cooperating arrangement in whichthe arms 124, 126 pivot and move to avoid conflict with consoles 112,114, 118 within the cab 102. For example, in clockwise positions, thecontrol arm 124 may avoid the first console 112 (and associated monitor116) by pivoting upwards and the armrest 126 may avoid the forwardconsole 118 (and associated steering wheel 120) by pivoting outwards;and in counterclockwise positions, the control arm 124 may avoid theforward console 112 (and associated monitor 116) by pivoting outwards.This enables more interfaces and/or controls on the consoles 112, 114,118; a fuller and/or larger control arm body 150 and/or armrest body170; and/or more potential arm and/or interface position selections foroperator comfort.

The views of FIGS. 16-19 provide additional details regarding thevertical lift function of the armrest 126. In one embodiment, thearmrest 126 may be considered to include a vertical adjustment apparatus284 that enables the repositioning of the armrest body 170 along thearmrest mounting post 270. In particular, the vertical adjustmentapparatus 284 may implements a clamped state in which the armrest body170 is secured and an unclamped state in which the armrest body 170 maybe repositioned. For example, and particularly referring to FIG. 16, thearmrest body 170 may be repositioned from a relatively low position(depicted in solid lines in FIG. 16) to a relatively high position(depicted in dashed lines in FIG. 16), as well as intermediate verticalpositions, in the unclamped state. Further details of the verticaladjustment apparatus 284 are depicted in FIG. 17, which a partialcross-sectional view of the armrest body 170 through line 17-17 of FIG.16.

Referring to FIG. 17, the vertical adjustment apparatus 284 includes avertical adjustment apparatus base 286 within the interior of thearmrest body 170. A lever 288 is mounted to the vertical adjustmentapparatus base 286 with a lever axle 290. In particular, a levercylinder 292 surrounds the lever axle 290 to support the lever 288 onthe lever axle 290 relative to the vertical adjustment apparatus base286. As described below, the lever 288 may pivot on the lever axle 290such that a lever cylinder eccentric surface 294 selectively abuts orotherwise engages the vertical adjustment apparatus base 286. Thevertical adjustment apparatus 284 further includes a tie rod 296 with afirst end secured to the lever axle 290 and a second end secured to aclamp 298. As described in greater detail below, the tie rod 296 may beconsidered to be axially repositionable based on the position of thelever 288. The clamp 298 is fixed at a first end to the apparatus base286, extends around the armrest mounting post 270, and is secured to thetie rod 296 at a second end.

The views of FIGS. 18A and 19A depict each end of the tie rod 296 in theclamped state. In the clamped state, the lever 288 is positioned to pullthe tie rod 296 and therefore the surface of clamp 298 into a securefriction engagement with the surface of armrest mounting post 270. Inthis clamped state, the armrest body 170 is stationary or reasonablyunmovable relative to the armrest mounting post 270 and thus relative tothe chair seat 136. The views of FIGS. 18B and 19B depict each end ofthe tie rod 296 in the unclamped state in which the tie rod 296 is freeto move towards the clamp 298, thereby releasing the secure frictionengagement between the clamp 298 and the armrest mounting post 270. Inthis unclamped state, the armrest body 170 may be manually repositionedup or down the armrest mounting post 270 such that the armrest body 170may be repositioned by the operator.

The vertical adjustment apparatus 284 may be placed in the clamped stateor the unclamped state based on the position of the lever 288. Inparticular, and as shown in FIG. 18A, the lever 288 is “closed” orgenerally vertical (or flush) relative to armrest body 170. In thisposition of the lever 288, the eccentric surface 294 of the levercylinder 292 surrounding the lever axle 290 and connected to the tie rod296 is pressed against the vertical adjustment apparatus base 286,thereby pushing the lever axle 290 away from the vertical adjustmentapparatus base 286, which in turn pulls the end of the tie rod 296 in anoutward direction. In other words, the distance (X₁) between the centerof the lever axle 290 and the outer surface of the eccentric surface 294abutting the vertical adjustment apparatus base 286 is such the tie rod296 secures the clamp 298 against the armrest mounting post 270, asshown in FIG. 19A.

In contrast, and as shown in FIG. 18B, the lever 288 is “open” orgenerally horizontal relative to armrest body 170. In this position ofthe lever 288, the lever cylinder eccentric surface 294 of the levercylinder 292 is no longer abutting the vertical adjustment apparatusbase 286, thereby enabling movement of the lever axle 290 relativelycloser to the vertical adjustment apparatus base 286, which in turnreleases the end of the tie rod 296 into an inward direction. In otherwords, the distance (X₂) between the center of the lever axle 290 andthe outer surface of the lever cylinder 292 in a circumferentiallocation other than the lever cylinder eccentric surface 294 that abutsthe vertical adjustment apparatus base 286 positions the tie rod 296 torelease the tension of the clamp 298 against the armrest mounting post270, as shown in FIG. 19B. In effect, the eccentric surface 294 providesa cam force between the lever 288 and the tie rod 296 to secure theclamp 298 in the clamped state such that the armrest body 170 is atleast in part fixed to the mounting post 270 and releases the cam forcebetween the lever 288 and tie rod 297 to release or disengage thesurface of the clamp 298 relative to the surface of the mounting post270 in the unclamped state is repositionable along the mounting post270.

Accordingly, the present disclosure provides a mechanism for adjustingan operator station, particularly relative to the various consoleswithin a work vehicle.

Also, the following examples are provided, which are numbered for easierreference.

1. An operator station for a cab of a work vehicle, the operator stationcomprising: a base frame configured to be secured to a floor of the cab;a chair including a chair frame mounted on the base frame such that thechair is configured to swivel in first and second clock directions; afirst chair arm, including: a first chair arm body disposed proximateand repositionable with respect to a first lateral side of the chair;and a first chair arm adjustment mechanism coupled to the base frame andthe first chair arm body and configured to permit the first chair arm torotate in a first lateral plane relative to the chair in the first clockdirection when the chair rotates in the second clock direction relativeto the base frame and to rotate in the first lateral plane relative tothe chair frame in the second clock direction when the chair rotates inthe first clock direction relative to the base frame; and a second chairarm, including: a second chair arm body disposed proximate andrepositionable with respect to a second lateral side of the chair; and asecond chair arm adjustment mechanism coupled to the base frame and thesecond chair arm and configured to permit the second chair arm body torotate in a second lateral plane relative to the chair frame in thesecond clock direction when the chair rotates in the first clockdirection relative to the base frame and to rotate in the second lateralplane relative to the chair frame in the first clock direction when thechair rotates in the second clock direction relative to the base frame;wherein the rotation of the first chair arm body with respect to thechair frame and the rotation of the second chair arm body with respectto the chair frame occurs during at least a subset of angles of relativerotation of the chair with respect to the base frame.

2. The operator station of example 1, wherein the base frame includes afirst track, and wherein the first chair arm adjustment mechanismincludes a first cam that engages the first track as the chair rotatesin the first clock direction and the second clock direction.

3. The operator station of example 2, wherein the first track includesat least a first forward portion that radially diverges relative to acenter swivel axis such that the first chair arm rotates in the firstlateral plane in the first clock direction relative to the chair framewhen the chair rotates in the second clock directions relative to thebase frame when the first cam engages the first track in the firstforward portion.

4. The operator station of example 3, wherein the first track includes afirst rearward portion that is radially constant relative to the centerswivel axis such that the first chair arm is stationary within the firstlateral plane in the first clock direction relative to the chair framewhen the chair rotates in the second clock direction relative to thebase frame when the first cam engages the first track in the firstrearward portion.

5. The operator station of example 4, wherein the first chair armadjustment mechanism is configured such that the first chair arm isstationary within the first lateral plane when the chair rotates in thefirst clock direction relative to the base frame when the first camengages the first track in the first rearward portion.

6. The operator station of example 4, wherein the base frame includes asecond track, and wherein the second chair arm adjustment mechanismincludes a second cam that engages the second track as the chair rotatesin the first clock direction and the second clock direction.

7. The operator station of example 6, wherein the second track includesat least a first forward portion that radially diverges relative to thecenter swivel axis such that the second chair arm rotates in the secondlateral plane in the second clock direction relative to the chair framewhen the chair rotates in the first clock directions relative to thebase frame when the second cam engages the second track in the firstforward portion.

8. The operator station of example 7, wherein the second track includesa first rearward portion that is radially constant relative to thecenter swivel axis such that the second chair arm is stationary withinthe second lateral plane in the second clock direction relative to thechair frame when the chair rotates in the first clock direction relativeto the base frame when the second cam engages the second track in thefirst rearward portion.

9. The operator station of example 8, wherein the second chair armadjustment mechanism is configured such that the second chair arm isstationary within the second lateral plane when the chair rotates in thesecond clock direction relative to the base frame when the second camengages the second track in the first rearward portion.

10. The operator station of example 1, wherein the first chair armadjustment mechanism includes an adjustment bracket supporting the firstchair arm body and a pivot adjustment member coupled to the adjustmentbracket mounted to the chair frame.

11. The operator station of example 10, wherein the base frame includesa track, and wherein the pivot adjustment member includes a couplingstrut with a cam that engages the track of the base frame such that,when the chair rotates in the first clock direction, the cam engages thetrack to pivot the first chair arm adjustment mechanism and the firstchair arm in the second clock direction in the first lateral planerelative to the chair frame.

12. The operator station of example 1, wherein the first chair armadjustment mechanism is further configured to raise and lower the firstchair arm in a direction perpendicular to the first lateral plane.

13. The operator station of example 1, wherein the first chair armadjustment mechanism is further configured to pivot a first end of thefirst chair arm out of the first lateral plane while maintaining asecond end of the first chair arm within the first lateral plane.

14. An operator system in a cab of a work vehicle; comprising: at leastone work vehicle console; and an operator station for the cab of thework vehicle, the operator station including: a base frame configured tobe secured to a floor of the cab; a chair including a chair framemounted on the base frame such that the chair is configured to swivel infirst and second clock directions; a first chair arm, including: a firstchair arm body disposed proximate and repositionable with respect to afirst lateral side of the chair; and a first chair arm adjustmentmechanism coupled to the base frame and the first chair arm body andconfigured to permit the first chair arm to rotate in a first lateralplane relative to the chair in the first clock direction when the chairrotates in the second clock direction relative to the base frame and torotate in the first lateral plane relative to the chair frame in thesecond clock direction when the chair rotates in the first clockdirection relative to the base frame; and a second chair arm, including:a second chair arm body disposed proximate and repositionable withrespect to a second lateral side of the chair; and a second chair armadjustment mechanism coupled to the base frame and the second chair armand configured to permit the second chair arm body to rotate in a secondlateral plane relative to the chair frame in the second clock directionwhen the chair rotates in the first clock direction relative to the baseframe and to rotate in the second lateral plane relative to the chairframe in the first clock direction when the chair rotates in the secondclock direction relative to the base frame; wherein the rotation of thefirst chair arm body with respect to the chair frame and the rotation ofthe second chair arm body with respect to the chair frame occurs duringat least a subset of angles of relative rotation of the chair withrespect to the base frame to avoid contact with the at least one workvehicle console.

15. The operator system of example 14, wherein the at least one workvehicle console is in front of the operator station.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the disclosure.As used herein, the singular forms “a”, “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. It will be further understood that the terms “comprise”and/or “comprising,” when used in this specification, specify thepresence of stated features, integers, steps, operations, elements,and/or components, but do not preclude the presence or addition of oneor more other features, integers, steps, operations, elements,components, and/or groups thereof.

The description of the present disclosure has been presented forpurposes of illustration and description, but is not intended to beexhaustive or limited to the disclosure in the form disclosed. Manymodifications and variations will be apparent to those of ordinary skillin the art without departing from the scope and spirit of thedisclosure. Explicitly referenced embodiments herein were chosen anddescribed to best explain the principles of the disclosure and theirpractical application, and to enable others of ordinary skill in the artto understand the disclosure and recognize many alternatives,modifications, and variations on the described example(s). Accordingly,various embodiments and implementations other than those explicitlydescribed are within the scope of any claims.

What is claimed is:
 1. An operator station for a cab of a work vehicle, the operator station comprising: a base frame configured to be secured to a floor of the cab; a chair including a chair frame mounted on the base frame such that the chair is configured to swivel in first and second clock directions; a first chair arm, including: a first chair arm body disposed proximate and repositionable with respect to a first lateral side of the chair; and a first chair arm adjustment mechanism coupled to the base frame and the first chair arm body and configured to permit the first chair arm to rotate in a first lateral plane relative to the chair in the first clock direction when the chair rotates in the second clock direction relative to the base frame and to rotate in the first lateral plane relative to the chair frame in the second clock direction when the chair rotates in the first clock direction relative to the base frame; and a second chair arm, including: a second chair arm body disposed proximate and repositionable with respect to a second lateral side of the chair; and a second chair arm adjustment mechanism coupled to the base frame and the second chair arm and configured to permit the second chair arm body to rotate in a second lateral plane relative to the chair frame in the second clock direction when the chair rotates in the first clock direction relative to the base frame and to rotate in the second lateral plane relative to the chair frame in the first clock direction when the chair rotates in the second clock direction relative to the base frame; wherein the rotation of the first chair arm body with respect to the chair frame and the rotation of the second chair arm body with respect to the chair frame occurs during at least a subset of angles of relative rotation of the chair with respect to the base frame.
 2. The operator station of claim 1, wherein the base frame includes a first track, and wherein the first chair arm adjustment mechanism includes a first cam that engages the first track as the chair rotates in the first clock direction and the second clock direction.
 3. The operator station of claim 2, wherein the first track includes at least a first forward portion that radially diverges relative to a center swivel axis such that the first chair arm rotates in the first lateral plane in the first clock direction relative to the chair frame when the chair rotates in the second clock direction relative to the base frame when the first cam engages the first track in the first forward portion.
 4. The operator station of claim 3, wherein the first track includes a first rearward portion that is radially constant relative to the center swivel axis such that the first chair arm is stationary within the first lateral plane in the first clock direction relative to the chair frame when the chair rotates in the second clock direction relative to the base frame when the first cam engages the first track in the first rearward portion.
 5. The operator station of claim 4, wherein the first chair arm adjustment mechanism is configured such that the first chair arm is stationary within the first lateral plane when the chair rotates in the first clock direction relative to the base frame when the first cam engages the first track in the first rearward portion.
 6. The operator station of claim 4, wherein the base frame includes a second track, and wherein the second chair arm adjustment mechanism includes a second cam that engages the second track as the chair rotates in the first clock direction and the second clock direction.
 7. The operator station of claim 6, wherein the second track includes at least a first forward portion that radially diverges relative to the center swivel axis such that the second chair arm rotates in the second lateral plane in the second clock direction relative to the chair frame when the chair rotates in the first clock direction relative to the base frame when the second cam engages the second track in the first forward portion.
 8. The operator station of claim 7, wherein the second track includes a first rearward portion that is radially constant relative to the center swivel axis such that the second chair arm is stationary within the second lateral plane in the second clock direction relative to the chair frame when the chair rotates in the first clock direction relative to the base frame when the second cam engages the second track in the first rearward portion.
 9. The operator station of claim 8, wherein the second chair arm adjustment mechanism is configured such that the second chair arm is stationary within the second lateral plane when the chair rotates in the second clock direction relative to the base frame when the second cam engages the second track in the first rearward portion.
 10. The operator station of claim 1, wherein the first chair arm adjustment mechanism includes an adjustment bracket supporting the first chair arm body and a pivot adjustment member coupled to the adjustment bracket mounted to the chair frame.
 11. The operator station of claim 10, wherein the base frame includes a track, and wherein the pivot adjustment member includes a coupling strut with a cam that engages the track of the base frame such that, when the chair rotates in the first clock direction, the cam engages the track to pivot the first chair arm adjustment mechanism and the first chair arm in the second clock direction in the first lateral plane relative to the chair frame.
 12. The operator station of claim 1, wherein the first chair arm adjustment mechanism is further configured to raise and lower the first chair arm in a direction perpendicular to the first lateral plane.
 13. The operator station of claim 1, wherein the first chair arm adjustment mechanism is further configured to pivot a first end of the first chair arm out of the first lateral plane while maintaining a second end of the first chair arm within the first lateral plane.
 14. An operator system in a cab of a work vehicle; comprising: at least one work vehicle console; and an operator station for the cab of the work vehicle, the operator station including: a base frame configured to be secured to a floor of the cab; a chair including a chair frame mounted on the base frame such that the chair is configured to swivel in first and second clock directions; a first chair arm, including: a first chair arm body disposed proximate and repositionable with respect to a first lateral side of the chair; and a first chair arm adjustment mechanism coupled to the base frame and the first chair arm body and configured to permit the first chair arm to rotate in a first lateral plane relative to the chair in the first clock direction when the chair rotates in the second clock direction relative to the base frame and to rotate in the first lateral plane relative to the chair frame in the second clock direction when the chair rotates in the first clock direction relative to the base frame; and a second chair arm, including: a second chair arm body disposed proximate and repositionable with respect to a second lateral side of the chair; and a second chair arm adjustment mechanism coupled to the base frame and the second chair arm and configured to permit the second chair arm body to rotate in a second lateral plane relative to the chair frame in the second clock direction when the chair rotates in the first clock direction relative to the base frame and to rotate in the second lateral plane relative to the chair frame in the first clock direction when the chair rotates in the second clock direction relative to the base frame; wherein the rotation of the first chair arm body with respect to the chair frame and the rotation of the second chair arm body with respect to the chair frame occurs during at least a subset of angles of relative rotation of the chair with respect to the base frame to avoid contact with the at least one work vehicle console.
 15. The operator system of claim 14, wherein the at least one work vehicle console is in front of the operator station.
 16. The operator system of claim 14, wherein the base frame includes a first track, and wherein the first chair arm adjustment mechanism includes a first cam that engages the first track as the chair rotates in the first clock direction and the second clock direction.
 17. The operator system of claim 16, wherein the first track includes at least a first forward portion that radially diverges relative to a center swivel axis such that the first chair arm rotates in the first lateral plane in the first clock direction relative to the chair frame when the chair rotates in the second clock direction relative to the base frame when the first cam engages the first track in the first forward portion; wherein the first track includes a first rearward portion that is radially constant relative to the center swivel axis such that the first chair arm is stationary within the first lateral plane in the first clock direction relative to the chair frame when the chair rotates in the second clock direction relative to the base frame when the first cam engages the first track in the first rearward portion; and wherein the first chair arm adjustment mechanism is configured such that the first chair arm is stationary within the first lateral plane when the chair rotates in the first clock direction relative to the base frame when the first cam engages the first track in the first rearward portion.
 18. The operator system of claim 17, wherein the base frame includes a second track; and wherein the second chair arm adjustment mechanism includes a second cam that engages the second track as the chair rotates in the first clock direction and the second clock direction.
 19. The operator system of claim 18, wherein the second track includes at least a first forward portion that radially diverges relative to the center swivel axis such that the second chair arm rotates in the second lateral plane in the second clock direction relative to the chair frame when the chair rotates in the first clock direction relative to the base frame when the second cam engages the second track in the first forward portion; wherein the second track includes a first rearward portion that is radially constant relative to the center swivel axis such that the second chair arm is stationary within the second lateral plane in the second clock direction relative to the chair frame when the chair rotates in the first clock direction relative to the base frame when the second cam engages the second track in the first rearward portion; and wherein the second chair arm adjustment mechanism is configured such that the second chair arm is stationary within the second lateral plane when the chair rotates in the second clock direction relative to the base frame when the second cam engages the second track in the first rearward portion.
 20. The operator system of claim 14, wherein the first chair arm adjustment mechanism includes an adjustment bracket supporting the first chair arm body and a pivot adjustment member coupled to the adjustment bracket mounted to the chair frame; and wherein the base frame includes a track, and wherein the pivot adjustment member includes a coupling strut with a cam that engages the track of the base frame such that, when the chair rotates in the first clock direction, the cam engages the track to pivot the first chair arm adjustment mechanism and the first chair arm in the second clock direction in the first lateral plane relative to the chair frame. 